Fluorescent tubes

Discussion in 'Electricians' Talk' started by furious_customer, Dec 2, 2019.

  1. furious_customer

    furious_customer Active Member

    I have a tube light in the garage and quickly measure the tube to be approx. 1700mm long.

    So next time I was passing by SF, I grabbed a 1764mm T4 tube but it was about 5mm too short.
    The original one on place was a T8 - so is a 1764 T4 shorter than a 1764 T8?
  2. Philip Hyde

    Philip Hyde Active Member

    A T4 lamp won't fit in a T8 light. Diameter is to small
  3. furious_customer

    furious_customer Active Member

    Are the pins not in the same place though?
  4. Philip Hyde

    Philip Hyde Active Member

    No T5 and T8 are same but T4 is smaller
  5. Wayners

    Wayners Screwfix Select

    Swap for led. You can replace the tube only I understand with led. Also need to swap starter.. My cold garage seems to kill the tube bulbs so that's my plan. I need advice on this as don't know much about it. I do know you need number off the tube and look up replacement as they can vary in size
  6. Philip Hyde

    Philip Hyde Active Member

    Depends what type of fitting you have. Switch start or electronic
  7. KIAB

    KIAB Super Member

    Philip do a the Philips CorePro LED tube EM,that comes with the required LED starter,they also offer HF version, just change starter & pop in new tube, simple.




    Wayners likes this.
  8. Wayners

    Wayners Screwfix Select

    Brilliant @KIAB
    Bookmarked as I need one. I'll have to look at price Vs total new led but that's what I wanted to know. useful information
    Sparkielev and KIAB like this.
  9. KIAB

    KIAB Super Member

  10. DIYDave.

    DIYDave. Screwfix Select

    I’ve replaced my old T8 florie tubes with retrofit LED tubes that just require mains juice and nothing else - no starter motors, choke, electronic, magnetic ballasts - nothing

    Whatever it needs is built into circuitry in tube

    So you gut your old fitting, either remove any/all of the above or simply disconnect the wires

    Connect end cap fitting direct to mains supply inside fitting (usually a simple connector strip) connect led tube and off you go

    Got them from a local wholesaler who was replacing fittings inside a friends shop with same type

    Simplicity and great light

    6’ led tubes are a bit weird as they sag in the middle, being made of plastic, not glass and clearly just supported at ends isn’t enough (cable tie to the rescue) !
  11. Tony Goddard

    Tony Goddard Well-Known Member

    I'm not a fan of the remove the ballast and feed 230 to one tube cap set ups, problem comes if someone then puts a regular tube or tube of different configuration in later and BANG.

    Osram do a good LED tube I have used a lot, simply replaces the existing tube, no wiring changes needed on electronic ballast and simply change the starter for a dummy with a fused link on switchstart, if you then put a regular tube back in the fused link blows.
  12. Woloumbo

    Woloumbo Active Member

    the fused link won’t blow,it will just cause the ends of the tube to glow orange as it will be stuck on preheat and not able to strike

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